djvu | 8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145

Analysis

max time kernel
145s
max time network
172s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
11/10/2023, 11:41

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General

Target

8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe
Size

767KB
MD5

ba46ae626df58081d056cda82d2673c6
SHA1

8c1c5e42666e0eaebbcd25f267252fe0256669f8
SHA256

8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145
SHA512

0065bd971f8f356a9d1c82d1ac75678323952dd4e25ea2ce046d4eaf1bcc3a7dca747170ff21d6d42b6cb939c9001283c8eb783c11e553d86dbbf0d00859bb00
SSDEEP

12288:pBGp4OBr2ASjaGFi8XBaXq38AInxP2pEDZkHZu/WnTCzweGgOjTi9YLINsADQ75t:pB8BWUXqsb52pEDZ06Wno0gOvVZ75

Score

10^/10

djvu discovery persistence ransomware

Malware Config

Extracted

Family

djvu

http://zexeq.com/raud/get.php

Attributes

extension
.mzhi
offline_id
64GZgS7xxeK837qu1w0KPUK0sweaDoAeJlv15vt1
payload_url
http://colisumy.com/dl/build2.exe

http://zexeq.com/files/1/build3.exe
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-sxZWJ43EKx Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0797JOsie

rsa_pubkey.plain

Signatures

Detected Djvu ransomware 14 IoCs

resource	yara_rule
behavioral1/memory/1988-1-0x0000000001D20000-0x0000000001E3B000-memory.dmp	family_djvu
behavioral1/memory/2560-4-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2560-7-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2560-8-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2560-26-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2560-29-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2832-39-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2832-123-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2832-138-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2832-139-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2832-143-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2832-145-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2832-146-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu
behavioral1/memory/2832-147-0x0000000000400000-0x0000000000537000-memory.dmp	family_djvu

Djvu Ransomware
Ransomware which is a variant of the STOP family.
ransomware djvu
Downloads MZ/PE file

Modifies file permissions 1 TTPs 1 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2912	icacls.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-607259312-1573743425-2763420908-1000\Software\Microsoft\Windows\CurrentVersion\Run\SysHelper = "\"C:\\Users\\Admin\\AppData\\Local\\3b4a6e66-20b4-4f84-9703-682de7e1f221\\8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe\" --AutoStart"	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe

Looks up external IP address via web service 3 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
3	api.2ip.ua
4	api.2ip.ua
11	api.2ip.ua

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1988 set thread context of 2560	1988	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	28
PID 2816 set thread context of 2832	2816	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	35

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2560	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe
2832	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe
2832	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1988 wrote to memory of 2560	1988	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	28
PID 1988 wrote to memory of 2560	1988	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	28
PID 1988 wrote to memory of 2560	1988	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	28
PID 1988 wrote to memory of 2560	1988	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	28
PID 1988 wrote to memory of 2560	1988	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	28
PID 1988 wrote to memory of 2560	1988	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	28
PID 1988 wrote to memory of 2560	1988	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	28
PID 1988 wrote to memory of 2560	1988	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	28
PID 1988 wrote to memory of 2560	1988	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	28
PID 1988 wrote to memory of 2560	1988	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	28
PID 1988 wrote to memory of 2560	1988	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	28
PID 2560 wrote to memory of 2912	2560	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	30
PID 2560 wrote to memory of 2912	2560	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	30
PID 2560 wrote to memory of 2912	2560	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	30
PID 2560 wrote to memory of 2912	2560	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	30
PID 2560 wrote to memory of 2816	2560	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	34
PID 2560 wrote to memory of 2816	2560	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	34
PID 2560 wrote to memory of 2816	2560	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	34
PID 2560 wrote to memory of 2816	2560	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	34
PID 2816 wrote to memory of 2832	2816	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	35
PID 2816 wrote to memory of 2832	2816	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	35
PID 2816 wrote to memory of 2832	2816	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	35
PID 2816 wrote to memory of 2832	2816	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	35
PID 2816 wrote to memory of 2832	2816	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	35
PID 2816 wrote to memory of 2832	2816	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	35
PID 2816 wrote to memory of 2832	2816	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	35
PID 2816 wrote to memory of 2832	2816	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	35
PID 2816 wrote to memory of 2832	2816	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	35
PID 2816 wrote to memory of 2832	2816	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	35
PID 2816 wrote to memory of 2832	2816	8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe	35

C:\Users\Admin\AppData\Local\Temp\8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe
"C:\Users\Admin\AppData\Local\Temp\8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1988
- C:\Users\Admin\AppData\Local\Temp\8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe
  "C:\Users\Admin\AppData\Local\Temp\8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2560
- - C:\Windows\SysWOW64\icacls.exe
    icacls "C:\Users\Admin\AppData\Local\3b4a6e66-20b4-4f84-9703-682de7e1f221" /deny *S-1-1-0:(OI)(CI)(DE,DC)
    3⤵
    - Modifies file permissions
    PID:2912
- - C:\Users\Admin\AppData\Local\Temp\8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe
    "C:\Users\Admin\AppData\Local\Temp\8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe" --Admin IsNotAutoStart IsNotTask
    3⤵
    - Suspicious use of SetThreadContext
    - Suspicious use of WriteProcessMemory
    PID:2816
  - - C:\Users\Admin\AppData\Local\Temp\8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe
      "C:\Users\Admin\AppData\Local\Temp\8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe" --Admin IsNotAutoStart IsNotTask
      4⤵
      Suspicious behavior: EnumeratesProcesses
      PID:2832

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

File and Directory Permissions Modification

T1222

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
1KB

MD5
bd46f6294e3241292aedafa99a6faa58

SHA1
1b246fd791f94e2bbddea358b976afbbbe20f735

SHA256
1a88895998b0b7162dfc150f588fcb3ae6846d3b91591eb024c6824eff7a5a25

SHA512
2486c1a6aec0154c74918fcf6470d16aabafd5a60c33c5204a309ee54a60f01c63d462a66667b16a4fdba57741e0e5bbf0fb7c5a3a498f98d8cffbbe3914e58f

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
724B

MD5
8202a1cd02e7d69597995cabbe881a12

SHA1
8858d9d934b7aa9330ee73de6c476acf19929ff6

SHA256
58f381c3a0a0ace6321da22e40bd44a597bd98b9c9390ab9258426b5cf75a7a5

SHA512
97ba9fceab995d4bef706f8deef99e06862999734ebe6a05832c710104479c6337cbf0a76e1c1e0f91566a61334dc100d837dfd049e20da765fe49def684f9c9

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA

Filesize
410B

MD5
d7cb2a0768f299c3a56d25077770a463

SHA1
df25d81a77883e7fff09beb76d51e7821aa6047f

SHA256
f892172ac301193941c5986ed5b4d292451eafb4ea3dd6890c55bc1652098822

SHA512
9c1428816aad590dd15cb9bd8de75c774bc6f0efb8b61db41cf2e5d045ea2caf677191d743d55c78b28a1a48ba5ea043710ddaf8b995299d4cd097c92a25b8c1

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

Filesize
344B

MD5
e37e29058c01132db4683d3b580ef451

SHA1
2da18e21416e781696f46049e12387198a2443a6

SHA256
8b22044eba12d2606405951556cc74fcd51976f869dfcc4cf09e384e12f799b6

SHA512
09c4cd64055a85038c9fba882f40f9b783d39ab6311bf379f7c3b5e612b9e668134575ebc24713025873c455723dc31a9ffd685d510b17bdebbcc815ec47c0d6

Download Submit
C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464

Filesize
392B

MD5
ddd167c1889565280f26333556af94b5

SHA1
a03ff65995b48eff22f8335604979f39fc1cbb19

SHA256
fea0efad299af05c5c13ccb2339e8e6d258eee39273ddbc0fe2c521de2af8ebb

SHA512
8fbd68f247c8f59e75ff9819fee8bedd483eba6b5a2883f733e1ebaad920274f81b33bc44a4780983b8ddb5b18dc53514744c74ccdc115af82fd387247e51b15

Download Submit
C:\Users\Admin\AppData\Local\3b4a6e66-20b4-4f84-9703-682de7e1f221\8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145.exe

Filesize
767KB

MD5
ba46ae626df58081d056cda82d2673c6

SHA1
8c1c5e42666e0eaebbcd25f267252fe0256669f8

SHA256
8a11f4d34a4ba7afea677810458e7aa6d31983f4dcd20d5eb5cff0c48f192145

SHA512
0065bd971f8f356a9d1c82d1ac75678323952dd4e25ea2ce046d4eaf1bcc3a7dca747170ff21d6d42b6cb939c9001283c8eb783c11e553d86dbbf0d00859bb00

Download Submit
C:\Users\Admin\AppData\Local\Temp\Cab3C84.tmp

Filesize
61KB

MD5
f3441b8572aae8801c04f3060b550443

SHA1
4ef0a35436125d6821831ef36c28ffaf196cda15

SHA256
6720349e7d82ee0a8e73920d3c2b7cb2912d9fcf2edb6fd98f2f12820158b0bf

SHA512
5ba01ba421b50030e380ae6bbcd2f681f2a91947fe7fedb3c8e6b5f24dce9517abf57b1cf26cc6078d4bb53bde6fcfb2561591337c841f8f2cb121a3d71661b9

Download Submit
memory/1988-0-0x00000000002A0000-0x0000000000331000-memory.dmp

Filesize
580KB

Download
memory/1988-6-0x00000000002A0000-0x0000000000331000-memory.dmp

Filesize
580KB

Download
memory/1988-1-0x0000000001D20000-0x0000000001E3B000-memory.dmp

Filesize
1.1MB

Download
memory/2560-8-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-2-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2560-4-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-29-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-26-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2560-7-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-39-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-123-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-138-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-139-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-143-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-145-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-146-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download
memory/2832-147-0x0000000000400000-0x0000000000537000-memory.dmp

Filesize
1.2MB

Download